How many spinal nerves are there in the human body?

The human body has 31 pairs of spinal nerves, which are part of the peripheral nervous system and emerge from the spinal cord. These are categorized into 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal pair. Each pair serves specific regions of the body, transmitting sensory and motor information. Option A, '12 pairs', refers to the cranial nerves, which originate from the brain, not the spinal cord. Option B, '24 pairs', is incorrect and does not correspond to any recognized number of nerve pairs. Option D, '33', is closer to the number of vertebrae, not the pairs of spinal nerves.